#ifndef KERNEL_RINGBUFFER_H_
#define KERNEL_RINGBUFFER_H_

#include <kernel/flags.h>
#include <kernel/locks.h>
#include <kernel/types.h>
#include <kernel/wait.h>

struct ringbuffer {
	unsigned char *r_buffer;
	size_t r_write_ptr;
	size_t r_read_ptr;
	size_t r_size;
	spin_lock_t r_lock;
	struct waitqueue r_wait_readers;
	struct waitqueue r_wait_writers;
};

extern struct ringbuffer *ringbuffer_create(size_t size);
extern void ringbuffer_destroy(struct ringbuffer *buf);

extern kern_status_t ringbuffer_init(struct ringbuffer *buf, size_t size);
extern kern_status_t ringbuffer_deinit(struct ringbuffer *buf);

extern size_t ringbuffer_unread(struct ringbuffer *buf);
extern size_t ringbuffer_avail(struct ringbuffer *buf);
extern size_t ringbuffer_read(
	struct ringbuffer *buf,
	size_t size,
	void *buffer,
	mango_flags_t flags);
extern size_t ringbuffer_write(
	struct ringbuffer *buf,
	size_t size,
	const void *buffer,
	mango_flags_t flags);

/* TODO */
// extern size_t ringbuffer_peek(struct ringbuffer *buf, size_t at, size_t size,
// void *buffer); extern size_t ringbuffer_skip(struct ringbuffer *buf, size_t
// count);

extern int ringbuffer_write_would_block(struct ringbuffer *buf);

#endif